Procedia Structural Integrity最新文献_第3页

A simple K-SVD dictionary learning method for baseline-free damage identification purely based on analytical excitation 一种简单的基于分析激励的无基线损伤识别K-SVD字典学习方法

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-17 DOI: 10.1016/j.prostr.2026.02.006

Haomiao Fang , Zahra Sharif Khodaei , Ferri M.H. Aliabadi

{"title":"A simple K-SVD dictionary learning method for baseline-free damage identification purely based on analytical excitation","authors":"Haomiao Fang , Zahra Sharif Khodaei , Ferri M.H. Aliabadi","doi":"10.1016/j.prostr.2026.02.006","DOIUrl":"10.1016/j.prostr.2026.02.006","url":null,"abstract":"<div><div>This paper presents a simple K-SVD dictionary learning method for transferable, baseline-free damage identification on composite coupon panels, relying solely on the analytical excitation. The analytical signal, encapsulating universal patterns of Lamb wave pristine signals, can be segmented, and reorganized as ‘shapelets’. These shapelets serve as a universal function to reconstruct baseline signals and further facilitate damage identification. The key innovation lies in the pure use of the analytical 5-cycle Hanning-windowed toneburst signal instead of requiring extensive experimental data, which minimizes data collection efforts and significantly lowers computational time. The proposed methodology is comprised of four steps: candidate generation, K-SVD dictionary learning, dictionary compilation and sparse coding, which has a wide application to different materials, temperature fields, specimen sizes, sensor configurations, etc. Prior to the implementation of the proposed method, a standard signal pre-processing pipeline is operated to enhance the data quality. In this study, experimental comparisons were conducted between the proposed baseline-free K-SVD, time reversal (TR), instantaneous baseline (IB), and reciprocity approach, leveraging data from composite coupon panels. Furthermore, it was extended to detect the barely visible impact damage (BVID) under a temperature range of [20: 5: 50] °C. Consequently, the effectiveness and robustness of the method have been validated based on the high accuracy and consistent localization performance across different damage scenarios.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"80 ","pages":"Pages 53-64"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147424829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemo-Thermo-Mechanical Phase Field Modeling of Sulfide Stress Cracking in DCB Testing and Effect of Plasticity DCB试验中硫化物应力开裂的化学-热-机械相场模拟及塑性影响

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-17 DOI: 10.1016/j.prostr.2026.02.018

M. Elkhodbia , I. Barsoum

{"title":"Chemo-Thermo-Mechanical Phase Field Modeling of Sulfide Stress Cracking in DCB Testing and Effect of Plasticity","authors":"M. Elkhodbia , I. Barsoum","doi":"10.1016/j.prostr.2026.02.018","DOIUrl":"10.1016/j.prostr.2026.02.018","url":null,"abstract":"<div><div>Hydrogen-assisted cracking (HAC), particularly sulfide stress cracking (SSC) in sour environments, threatens the structural integrity of critical components. While a prior model developed by the authors have addressed temperature-dependent hydrogen diffusion and fracture energy degradation within an elastic phase-field framework, the influence of plastic deformation remains underexplored. This work enhances the developed chemo-thermo-mechanical phase-field model by incorporating standard elasto-plasticity and a coupling mechanism where plastic work partially drives fracture. The formulation accounts for temperature-induced stress, hydrogen-induced toughness degradation, and diffusion kinetics. Validation is performed using DCB simulations of P110 steel under sour conditions across various temperatures, benchmarked against experimental data. Both the elastic and elasto-plastic models capture the observed rise in the SSC threshold K<sub>ISSC</sub> with temperature, while the elasto-plastic variant predicts slightly more accurate thresholds. For the SSC conditions examined, plasticity had a limited impact on macroscopic behavior, with temperature-dependent transport and degradation being the dominant factors. The proposed model offers a more complete tool for HAC analysis and can support future studies where plasticity plays a larger role.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"80 ","pages":"Pages 187-194"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147426065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation-based optimization of molten pool position in sand casting of a complex steering knuckle geometry 基于仿真的复杂转向节几何形状砂型铸造熔池位置优化

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-17 DOI: 10.1016/j.prostr.2025.12.308

Kazem Reza Kashyzadeh , Negewo Getu Bogale

{"title":"Simulation-based optimization of molten pool position in sand casting of a complex steering knuckle geometry","authors":"Kazem Reza Kashyzadeh , Negewo Getu Bogale","doi":"10.1016/j.prostr.2025.12.308","DOIUrl":"10.1016/j.prostr.2025.12.308","url":null,"abstract":"<div><div>This study presents a simulation-driven approach to optimizing the sand casting process for an industrial component with complex geometry, e.g., a steering knuckle used in vehicle suspension and steering systems. The geometric complexity of the component, which varies by vehicle design, poses significant challenges in achieving defect-free castings. Using advanced casting simulation software, the process was analyzed under various conditions to determine the optimal molten pool position. The evaluation criteria focused on minimizing thermal stresses and reducing casting defects such as air entrapment. Results highlight the influence of pouring direction on defect formation and thermal distribution, offering practical insights for improving casting quality and structural integrity in complex automotive components. According to the findings of this study, it is concluded that by choosing the right location for pouring the melt, the maximum thermal stress in the desired steering knuckle can be reduced by 10 MPa. In addition, the component is produced in a defect-free state or with a defect size that is so small that it can be ignored.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 65-72"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147407397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of pre-tension on the fatigue durability of rubber with a single reinforcement layer 预张力对单层补强橡胶疲劳耐久性的影响

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-17 DOI: 10.1016/j.prostr.2025.12.319

Karolina Głowacka , Roland Pawliczek , Marko Nagode , Jernej Klemenc , Tadeusz Łagoda

{"title":"The influence of pre-tension on the fatigue durability of rubber with a single reinforcement layer","authors":"Karolina Głowacka , Roland Pawliczek , Marko Nagode , Jernej Klemenc , Tadeusz Łagoda","doi":"10.1016/j.prostr.2025.12.319","DOIUrl":"10.1016/j.prostr.2025.12.319","url":null,"abstract":"<div><div>This study presents the results of fatigue tests on a composite material in which rubber is the matrix, while the reinforcement consists of a single layer of interwoven nylon cords arranged in a 0/90<sup>o</sup> configuration. The tests were carried out using cyclic, symmetrical three-point bending of composite samples. This method, due to the negligible bending-induced stress, resulted in unidirectional cyclic tension in the sample. The loading was displacement-controlled and performed in two variants: without pre-tension and with pre-tension of approximately 10%. The failure criterion was defined as the point at which the force amplitude dropped to 50% of its initial value. Analysis of the results showed that the fatigue process is well described by the fatigue characteristic in the form of maximum strain in the sample versus the number of cycles to failure. Although the strain-time profiles differed between the non-pre-tensioned and pre-tensioned samples, the observed relationship proved to be universal. The application of pre-tension introduced a wider variety of mean values, enhancing the reliability of the obtained results.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 155-160"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147407407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leaching characteristics of alkali-activated materials incorporated with different by-products 不同副产物掺入碱活化物料的浸出特性

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-05-01 DOI: 10.1016/j.prostr.2026.04.033

Samia M. Mohamed , Asad Hanif , Hammad R. Khalid , Umair Ali

{"title":"Leaching characteristics of alkali-activated materials incorporated with different by-products","authors":"Samia M. Mohamed , Asad Hanif , Hammad R. Khalid , Umair Ali","doi":"10.1016/j.prostr.2026.04.033","DOIUrl":"10.1016/j.prostr.2026.04.033","url":null,"abstract":"<div><div>Alkali-activated materials (AAMs) are sustainable alternatives to ordinary Portland cement, offering lower carbon emissions. Whereas AAMs exhibit superior mechanical properties, their environmental impact, particularly the potential leaching of heavy elements, is a critical concern. In this paper, the leaching attributes of AAMs synthesized from different industrial by-products, including ground granulated blast furnace slag (GGBS), fly ash (FA), and red mud (RM), are reviewed, highlighting the primary leaching mechanisms and the influence of pH, activator type, precursor composition, and environmental exposure on the release of hazardous elements. GGBS-incorporated AAMs can efficiently trap heavy metals through the production of dense C-A-S-H gel, especially when activated with sodium silicate. FA-based AAMs exhibit varying leaching attributes, influenced by the activator, with higher immobilization for cationic metals; however, oxyanions, such as As and Cr(VI), are difficult to immobilize, particularly at high pH levels. RM-based AAMs demonstrate complex leaching properties due to their high alkalinity and metallic ion content, with elements like V and Cr(VI) showing elevated mobility. Therefore, blending with GGBS or FA is preferred because it significantly enhances immobilization. The findings emphasize the critical role of precursor selection, activator chemistry, and curing conditions in optimizing AAMs to improve their environmental safety and long-term performance in construction applications.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"82 ","pages":"Pages 213-219"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure and mechanical properties of hydroxyapatite bioceramic obtained by high temperature sintering 高温烧结羟基磷灰石生物陶瓷的结构与力学性能

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-05-01 DOI: 10.1016/j.prostr.2026.04.003

Tsanka Dikova , Ivaylo Parushev , Dzhendo Dzhendov , Stanislav Mitkov , Vladimir Dunchev

{"title":"Structure and mechanical properties of hydroxyapatite bioceramic obtained by high temperature sintering","authors":"Tsanka Dikova , Ivaylo Parushev , Dzhendo Dzhendov , Stanislav Mitkov , Vladimir Dunchev","doi":"10.1016/j.prostr.2026.04.003","DOIUrl":"10.1016/j.prostr.2026.04.003","url":null,"abstract":"<div><div>The aim of the present study is to investigate the microstructure, phase composition, porosity and mechanical properties of hydroxyapatite (HA) bioceramics obtained by high-temperature sintering. Two groups of cylindrical specimens with height h=15 mm (Group 1) and h=30 mm (Group 2) were prepared by freeze drying method. Then the samples were sintered at 1450 <sup>o</sup>C temperature. The microstructure, phase composition, porosity and maximum breaking force of the samples were investigated by OM, XRD and compression test. It was found that after sintering, the phase composition of HA samples changed to biphasic: 66 % HA and 34 % tetra-calcium phosphate (TTCP). The sintered HA samples were characterized with inhomogeneous porous microstructure: dense at the bottom, well-shaped elliptical pores in the top layer and mostly lamellar pores in the middle. The top layer in the samples of Group 1 was thicker compared to Group 2. A large crack at the boundary between top porous layer and main volume as well as several large cracks inside the volume were observed. Inverse proportional relationship was confirmed between the porosity and breaking force in compression of the investigated bioceramic specimens: the average porosity in Group 1 (70.1 %) was higher than that in Group 2 (65.5 %) leading to fracture of the samples in the first group at lower force (173 N) compared to the second (350 N).</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"82 ","pages":"Pages 9-15"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of supports subsidence on delamination of clamped columns 支座沉降对固支柱分层的影响

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-05-01 DOI: 10.1016/j.prostr.2026.04.039

Victor Rizov

{"title":"Effect of supports subsidence on delamination of clamped columns","authors":"Victor Rizov","doi":"10.1016/j.prostr.2026.04.039","DOIUrl":"10.1016/j.prostr.2026.04.039","url":null,"abstract":"<div><div>The frequent use of columns as members of a variety of load-bearing engineering structures and facilities requires detailed analyses of different problems associated with strength, fracture and failure. The clamped column under consideration in this paper represents a tri-layered structure. The external layers are symmetric. The layers have viscoelastic behaviour. Besides, the layers are made by materials which exhibit continuous inhomogeneity along the column length. The aim of this paper is to analyze two delamination cracks between layers. The column is under support subsidence. The effect of the subsidence on delamination cracks is explored in detail. In this relation, a solution of the strain energy release rate that accounts for the support subsidence is derived. The solution also takes into account the continuous change of the material properties along the column length. This solution is checked-up against early published approaches for obtaining of the strain energy release rate. Additionally, the study examines how the length of the delamination cracks influences the strain energy release rate. A parametric study is carried-out to explore the effects of the material inhomogeneity and other parameters on the delaminations in the column under support subsidence.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"82 ","pages":"Pages 253-259"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147807430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sensitivity to notch effect of additively manufactured polymers and polymer-matrix composites 增材制造聚合物和聚合物基复合材料对缺口效应的敏感性

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2026.01.009

Sergio Cicero , Sergio Arrieta

引用次数: 0

On dynamic fracture along curved planes of weakness 沿软弱曲面的动态断裂

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2026.01.025

Koji Uenishi

{"title":"On dynamic fracture along curved planes of weakness","authors":"Koji Uenishi","doi":"10.1016/j.prostr.2026.01.025","DOIUrl":"10.1016/j.prostr.2026.01.025","url":null,"abstract":"<div><div>The wave field generated by dynamic fracture in elastic solids varies considerably depending on the Mach numbers, i.e. the ratios between the speed of the propagating fracture tip and the longitudinal (P) and shear (S) wave speeds. However, the wave field itself is symmetric with respect to the fracture plane as long as the fracture propagates in a straight manner. This symmetry is held even when fracture propagates straightly along a plane of weakness (interface) between identical solids, and therefore, in order to break the symmetry, usually, fracture propagation along an interface between dissimilar solids is considered. Here, another possibility to break the symmetry, namely, fracture propagation along a curved interface between identical solids, is investigated. As simply expected, two-dimensional finite difference numerical simulations of fracture (an energy source) moving dynamically along a circular or an arc-shaped loose interface show that the wave field becomes indeed asymmetric with respect to the interface, and the induced waves can be strongly confined to specific regions on the convex side of the interface regardless of the Mach numbers. Possible influences of this asymmetric wave confining or focusing due to the existence of curved interfaces are considered by treating real phenomena found in the event of the 2024 Noto Peninsula, Japan, earthquake.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"77 ","pages":"Pages 183-189"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Angular Corners on Short Fiber Orientation and Mechanical Integrity in Extrusion 3D Printing 角对挤出3D打印短纤维取向和机械完整性的影响

Procedia Structural Integrity Pub Date : 2026-01-01 Epub Date: 2026-02-04 DOI: 10.1016/j.prostr.2026.01.019

Jiongyi Yan , Minghua Cao , Yutai Su , Andrew Gleadall

{"title":"Effects of Angular Corners on Short Fiber Orientation and Mechanical Integrity in Extrusion 3D Printing","authors":"Jiongyi Yan , Minghua Cao , Yutai Su , Andrew Gleadall","doi":"10.1016/j.prostr.2026.01.019","DOIUrl":"10.1016/j.prostr.2026.01.019","url":null,"abstract":"<div><div>Angular paths and corners are common in toolpaths in material extrusion additive manufacturing and could affect shear and material flow. This study focuses on 3D printed corners by using short fibre reinforced materials regarding the fibre orientation and mechanics. 3D fibre orientation tensor at different turn angles (30°-150°) was measured, and main-axis alignment was low when it turned orthogonally, while out-of-plane alignment increased with the angles. The fibre orientation closely links to mechanical properties. Tensile tests showed decreasing response force with increasing turn angles, and failure was attributed to fibre pull-out, fibre displacement, and matrix plastic deformation. We built 2D finite-element models of the 150° corner with the composite Hashin damage criterion and energy-based damage evolution law, in order to simulate large deformation failure model. The mechanical simulation successfully captured important features of specimen fracture due to crack initiation and propagation, which agreed with the experiment. Finally, cyclic tensile of displacement-controlled modes showed fast mechanical degradation of the sharp corners (greater turn angles) and compliance of smaller turn angles. This study highlights the variation of fibre orientation and mechanical weakness at corners, especially for sharp corners. It may enlighten design strategies (e.g. lattices with angular corners) to control fibre orientation and avoid mechanical weakness.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"77 ","pages":"Pages 135-142"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0